Moment.js Sandbox
HTML
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>
JavaScript
let now = moment()
let future = moment().add(5, 'years')
console.log(now.format())
console.log(future.format())
var duration = moment.duration(future.diff(now))
console.log(duration.years())
console.log(duration.months())
console.log(duration.days())